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Transcript
ASTRAL PROJECTIONS
June 2012
Volume 23 Issue 6
Meeting Schedule
June 8th ASTRA Meeting
"TBA"
“How to read Sky Charts” by
Bob Sal
Astronomers love eclipses. And this has been a great year for them! An eclipse happens when one object in space gets right in front of another object in space. Seeing that happen is awesome! And it is a chance to learn more about one or both of the objects. Depending on what gets in front of what, we have different names for the eclipse. Date: Friday, 6/8/2012
Time: 7:00 PM - 10:00 PM
Location: Robert J. Novins
Planetarium, College Drive,
Ocean County College, Toms
River, NJ 08754
July 13th ASTRA
Presentation "Solar
Astronomy"
Presentation "Solar
Astronomy" by Bill Edelen
Date: Friday, 7/13/2012
When the Moon passes between us and the Sun, we call it a solar eclipse. It is the Sun that is being "eclipsed" (meaning hidden or blocked from sight). To form an eclipse, the two objects and the observer must be located along a straight line. Time: 7:00 PM - 10:00 PM
Location: Robert J. Novins
Planetarium, College Drive,
Ocean County College, Toms
River, NJ 08754
A look inside:
Venus Transit. Page 1
What’s up this month? Page 4
Loaner Telescopes. Page 5
June Sky Chart. Page 6
When Earth passes right between the Sun and the Moon, we get a lunar eclipse. Continued page 2
2 Astronomical Items for Sale, or
Help Wanted Advertisements:
If you have an item to Sell, or
need help with an astronomical
problem (a question, or Telescope
setup) contact the President
[email protected] or the
ASTRA Hotline 609-971-3331 to
announce it at a meeting and send
the advertisement to the
newsletter (See Newsletter
below).
These are the most notable eclipses we see on Earth. During a solar
eclipse, daylight gets dimmer for a few minutes, then returns to normal.
During a lunar eclipse, the Moon may look like an orange ball. We can
still see it because it reflects some sunlight that has grazed Earth's
atmosphere, becoming reddened and scattered by the atmosphere as if
at sunset.
There is one other very rare eclipse that we can also see happening
before our very SHIELDED eyes. That one is called a "Venus transit."
Venus orbits closer to the Sun than Earth does. Sometimes Venus
passes between Earth and the Sun. when things are lined up just right,
we can see Venus as a small black dot moving across the face of the
Sun.
How often can we see a Venus transit?
The next Venus transit occurs June 5 and 6, 2012.
Newsletter: E-mail material
(Meeting reports, Observing
reports) to [email protected]
EXECUTIVE BOARD
President – John Endreson,
[email protected];
Vice President-Secretary – Bob
Salvatore, [email protected];
Treasurer - Ro Spedaliere,
[email protected];
Newsletter Editor – John
Endreson, [email protected];
Webmaster – Donald Durett,
[email protected]
Check us out on Facebook, search
groups for ( ASTRA Astronomy )
and look for our logo.
The last Venus transit was in June 2004. But after 2012, the next one
will not occur until 2117! You will have wait until way past your 100th
birthday to see the next one. Want to know why?
At first, you might think the "schedule" of Venus transits sounds pretty
random. But there is a pattern:
Two transits 8 years apart,
Then 105.5 years with no transits,
Then two transits 8 years apart,
Then 121.5 years with no transits,
for a total cycle of 243 years.
Continued on page 3
3 So why don't we see a Venus transit more often? Since Venus orbits closer to the sun than Earth does, it has a shorter distance to go to make one "lap." For every 8 laps Earth makes, Venus makes about—but not exactly—
13 laps. That means Venus passes us up five times about every 8 years, or once about every 1.6 years. But we don't see Venus lined up in front of the sun every 1.6 years because Venus's orbit is tilted a bit from Earth's orbit. So when we would expect to see Venus passing us up, it is either above or below the Sun, so we don't see it. We see it only if at just that time in its orbit, it happens to be crossing Earth's orbit. Also, neither orbit is exactly circular, which throws off the rhythm of the dance just a bit more. We have been very lucky to see two Venus transits only 8 years apart! To see even one Venus transit in a lifetime is lucky timing! Since the invention of the telescope, Venus transits have occurred in: 1631 (not witnessed) & 1639 1761 & 1769 1874 & 1882 2004 & 2012 Check this map to see when the Venus transit of June 5 and 6, 2012, will occur at your location. Meanwhile, get hold of some solar viewing glasses. The Transit of Venus This will be the last chance in your lifetime to witness this event. The transit starts within a few minutes of 22:10 Universal Time (6:10 p.m. EDT) on June 5th and ends within a few minutes of 4:45 UT June 6th but our viewing of it will end at sunset. For best viewing of this event you want a clear view of the western horizon so you can watch the sun set. And REMEMBER!!! You’ll need special SOLAR GLASSES!!! Not sunglasses to view this event, also if you use a telescope/binoculars you will need a SOLAR FILTER!!! attached to the front of them to prevent eye damage. Viewing the Sun without the proper solar filters can cause immediate and irreversible eye damage BE SAFE!!! 4 ASTRA Public Outreach & Star Parties Schedule for June 2012
Cub Scout Pack - Camp Citta ”Outreach Event”
Their theme is "Space exploration" and 200-300 scouts will be in attendance.
Date: Saturday, 6/2/2012
Time: 8:00 PM - 10:30 PM
Location: Joseph A. Citta Scout Camp, 229 Brookville Road, Barnegat, NJ 08005
The Transit of Venus “Star Party”
Date: Tuesday, 6/5/2012
Time: 5:00 PM - 10:00 PM
Location: Jakes Branch County Park, Double Trouble Rd, Beachwood, NJ 08722
Earthwatch/Drexel at the Lighthouse Encampment “Outreach Event”
We begin the night sharing dinner with the Drexel Grad students and Earthwatch participants. They teach us
about turtles we teach them about the Universe.
Date: Friday, 6/15/2012
Time: 6:00 PM - 11:00 PM
Location: The Lighthouse Center, 7th Steet & Navajo Dr, Waretown, NJ 08758
Summer Star Watch “Star Party”
Members of the Astronomical Society of the Toms River Area (ASTRA) will setup their telescopes on campus
to share views of the planets and stars. Objects; Saturn, Mars, will be out, along with the constellations Virgo,
Hercules and other celestial objects of the summer season. Free Event Ocean County College Campus.
Date: Saturday, 6/23/2012
Time: 8:00 PM - 10:30 PM
Location: Robert J. Novins Planetarium, Colege Drive, Ocean County College, Toms River, NJ 08754
Earthwatch/Drexel at the Lighthouse Encampment “Outreach Event”
We begin the night sharing dinner with the Drexel Grad students,turtles and Earthwatch participants. They teach
us about turtles we teach them about the Universe.
Date: Friday, 6/29/2012
Time: 6:00 PM - 11:00 PM
Location: The Lighthouse Center, 7th Steet & Navajo Dr, Waretown, NJ 08758
Call the ASTRA Hotline 609-971-3331 or check the online message board on the date of the star party for
up to date information on these events.
5 ASTRA Library of Books & DVD’s
The following books and DVD's are
available to borrow for one month at a
time. Request for these items must be
made prior to our regular meeting and
returned the following meeting. Please email your request for these items to John
Endreson [email protected] or
call the ASTRA Hotline 609-971-3331
BOOKS
1) The National Air and Space Museum
Second Edition by C.D.B. Bryan
2) Milestones of Aviation Smithsonian
Institution National Air and Space
Museum
3) New Atlas of the Moon by Serge
Brunier (Author), Thierry Legault
(Photographer).
4) Encyclopedia of space by National
Geographic
5) The Real Mars by Michael Hanion
DVD’s
1) Parts 1&2 Understanding the
Universe What’s New in Astronomy
2003 Taught by: Professor Alex
Filippenko. Each pert has 8 lectures, 45
minutes per lecture.
2) Parts 1 to 5 Understanding the
Universe An Introduction to Astronomy
Taught by: Professor Alex Filippenko each
pert has 8 lectures, 45 minutes per lecture.
Club Telescopes A.S.T.R.A. owns four small telescopes 6‐inch Dobsonian 8‐inch Dobsonian 80mm Celestron Refractor 120mm EQ AstroView Refractor. These telescopes are available for club members to borrow and use for a month or two at a time. Wanted!
No longer used telescopes, Telescope parts,
and accessories.
Call the ASTRA Hotline at 609-971-3331
We will come and pick-up your used equipment.
ASTRA-WEAR: For Embroidered and/or Printed
items With the ASTRA Logo
3) COSMOS
In his "ship of the imagination," Carl
Sagan guides us to the farthest reaches of
space and takes us back into the history of
scientific inquiry in the course of 13
fascinating hours.
For a complete list of books and DVD’s,
visit our website or Call the ASTRA
Hotline at 609-971-3331.
You can see some samples at ASTRA meetings. To order by mail:
Shelter Cove Embroidery Co. 1333 Bay Ave Toms River, NJ
08753 call 732-506-7700 or E-mail [email protected]
What’s Out Tonight?
June 2012 Sky Chart
Instructions
N o r t h H o riz o n
FREE
Visit: WhatsOutTonight.com
Copyright ©2012 by Ken Graun. All rights reserved.
Double
Cluster
PERSEUS
Cap
ella
Kem
Cascbale’s
de
AU
RIG
A
Free for individual or group use but
absolutely not to be sold. Please
direct questions, suggestions
or corrections to
[email protected]
PEIA
CASSIO
CAME
LOPAR
D
h
Ca p
ALIS
LA
INI
M
GE
lux
Pol
M8
1/8
2
O
AC
DR
Thuban
B
Dip ig
pe
r
Miz
ar
CR
AT
ER
US
CH
HI
OP
NS
TIC
LIP
C
E
n
tur
Sa
a
Spic
04
M1
M
RV
CO
22
S
IU
AR
TT
GI
SA
Ant
ar e
6
R
HYD
s
SC
OR
PIU
S
s
ar
SEXT
ANS
M
LIBRA
HYDRA
LEO
Den
ebola
C
BER OMA
EN
ICE
S
Mel111
Sickle
NA
RO S
CO REALI
BO
M13
gue
65
E
RP
SE
TUM
SCU
bik
Regulus
CANES
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VENATIC
Keystone
HERCULES
a
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rus
Arctu
US
A
M4
Menkent
LUPU
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CENTAUR
Planets
The position of any visible, naked-eye
planet is indicated for the 15th of the
month with a size matching its magnitude. If the planet moves significatnly
during a month, other positions will
be noted with dates. The ECLIPTIC
is the path of the Sun through the
sky but the planets and Moon move
along it, too. It passes through
the constellations of the zodiac.
Magn
itude
s
–1
0 1
2 3
4
ce ar
Ni cul ct
no e
Bi Obj
US
S o u t h H o riz o n
er ster
ust
r Cl Clu ula
Sta bular y Neb
Glo netar
Pla bula
Ne laxy
Ga
r
Sta will
ble that hen
u
Do star two w gh a
e
u
On come thro at 50x
be ewed ope x.
vi lesc 100
te to
June 2012 Planet Notes
Venus, at magnitude –4.1, rises in the east 1 hour before the Sun.
Mars, at magnitude +0.7, sets around 1 am in the constellation Leo.
Jupiter, at magnitude –2.0, rises early in the morning about 1.5 hours
before the Sun. Saturn, at magnitude +0.6, sets around 3 am and is in
the constellation Virgo.
Distances planets are from the Earth this month:
Venus: 29,000,000 miles, Mars: 122,000,000 miles
Jupiter: 550,000,000 miles, Saturn: 858,000,000 miles.
We s t H o ri z o n
LEO R
O
MIN
CA
Kochab
SA
UR JOR erak
M
MA
ER
NC
Du
bh
e
Vega
M57
AQUILA
BOOT
ES
SE
RP
EN
S
Sa
M
M44
Little
URSA
Dipper
R
MINO
LYR
A
Nor
th
Cro ern
ss
Albireo
Coathanger
Cluster
A
Altair
Sky
VIRGO
M
7
r
sto
Ca
N
LY
X
A
RT
Polaris
No
St rth
ar
De
ne
b
CYG
NUS
VULPEC
UL
SAGITTA
DELPHIN
US
E a st H o riz o n
Top
of the
Alphard
CE
US
HE
CEP
PE
GA
SU
S
Face North, South, East or
West, then rotate the chart so
your direction is at the bottom.
Match the biggest stars on
the chart to the brightest stars in the sky.
The center of the
chart is the top
of the sky.